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实验用伏安法测定电池电动势和内阻有三种常用方法:公式法、图象法、等效法。公式法和图象法有助于全面、深刻地分析定量关系,等效法有助于直观、简洁地进行定性分析,每一种方法都不仅分析了电动势和内阻的测量值比真实值的偏大偏小情况,并且分析了测量值与真实值的关系。不同的方法可使得学生对此类问题理解得更为深刻。
There are three commonly used methods for the determination of electromotive force and internal resistance by voltammetry: formula method, image method and equivalent method. Formula method and image method help to analyze the quantitative relationship in a comprehensive and profound way. The equivalence method is helpful for the direct and concise qualitative analysis. Each method not only analyzes the measurement of electromotive force and internal resistance than the true value Big and small, and analyzed the relationship between the measured value and the real value. Different ways can make students understand such issues more profoundly.